Fix small spelling error in README.md (prometheus#417)

skudriashev · brian-brazil · commit a6d042ebfaaf · 2019-06-01T08:27:09.000+01:00
Signed-off-by: Stanislav Kudriashev &lt;stas.kudriashev@gmail.com&gt;
diff --git a/README.md b/README.md
@@ -461,7 +461,7 @@ return an empty list.
 
 ## Multiprocess Mode (Gunicorn)
 
-Prometheus client libaries presume a threaded model, where metrics are shared
+Prometheus client libraries presume a threaded model, where metrics are shared
 across workers. This doesn't work so well for languages such as Python where
 it's common to have processes rather than threads to handle large workloads.
 
